Tool for placing rivets



S. P. LYON March 10, 1925. 1528932 TOOL FOR PLACING RIVETS Filed Jan. 11. 1922 I I] I I Patented Mar. 10, 1925.

PATENT OFFICE.

SIDNEY P. LYON, OF DAYTON, OHIO.

root ron rnaome nrvn'rs.

Application filed January 11, 1922. Serial No. 628,517.

To all whom it may concern:

Be'it known that I, SIDNEY P. LYON, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Im rovements in Tools for Placing Rivets, 0 which the following is a specification.

This invention relates to atoolfor placing rivets inside of tubesand furnishing a backing for the same.

, t is very difficult to place a rivet throu h a tube from a'point within the tube. T e problems thus presented and like problems of positionin rivets in. places equally inaccessible are requently confronted in prac- ,tice.. My invention aims to provide a tool Abearing lock 13-having an arcuate pas-- orimechanism of simple construction and operation wherebyrivets .or the like may be readily positioned in the holes provided for them and backed for the external riveting operation. v

' The invention is described in the following specification, in connection with the accompanying drawings, in which:

Fig. 1 is a central longitudinal section of an embodiment of the invention in operative poiition within a tube; and

1 the l1ne 2-2 of Fig. 1. r

The numeral 10 designates a tube having a hole 11 through which it is desired to insert a rivet 12 so that the. head of the rivet will bear against-the inside of the tube. For this purpose myinvention rovides a tool the normal dimensions of w ich are slightly smaller than the inside diameter of the tube so that the tool may be slidingly positioned "within the tube.

From the following description 'it will be seen that m device is comprised as follows:

sage 14 formed therethrough is provided.

This arcuate passage passes through the cylindrical bore of an extension 15 of the block 13, which extension projects from.

one end of the block and has a recess formed therein ada ted .to receive one end of a magazine tu e16, which is fitted therein in such a-manner that the interior of'the magazine tube is in fact, a continuation of the passage 14. The other endof the magazine tube is closed b a detachable cap 17. A coil spring 18 wit in the magazine tube bears at one end against the cap and atthe other end against the last rivet of a row re 2 is; a transverse sectional view on of rivets contained within the assage 14 and tube 16. The spring 18 ten s tofeedthe outermost rivet outwardly into any opening which may come into registration therewith, the force of the spring being transmitted by successive rivets inthemagazine. The upper surface of the block 13 is prov vided w1th a groove 19 which terminates at one end at an abutment 20 having a curved inner surface corresponding to the curvature of a rivet head. A recess 21 is formed through the lower part of the block 13 and the upper portion of. the block is extended rearwardly and terminates in a boss 22 of cylindrical bore which boss marks the rear end of'said recess. The forward end of the recess is defined by the vertical and horizontal surfaces 23,- 24 respectively. An opening passes longitudinally through the boss 22and. a shaft 25 is rotatably mounted in said opening. A single spiral groove 26. of steep pitch is cut in the shaft and a .lug or splral thread27 on the cylindrical boss engaging said groove is adapted to advance the shaft quickly when a rotative movement is imparted thereto.

A look block 28 having a slightly concave lower surface ending in spaced supporting received within a socket formed in the forward end of shaft 25. The stub shaft is operation. The bearing block 13, spreader block 30 and lock block 28 comprise an expansible head.

The cylindrical boss 22 has a rearwardly extending annular flange 37 which surrounds the shaft 25 in s aced relation'thereto. The shaft 25 termlnates slightly rearwardly of the flange in a reduced cylindrical p tlilrtion 38 carrying. a transverse pin 39.

e latter engages in a'transverse slot 40 formed in the inner end of an operating shaft 41. This shaft is located within a tubular casing 42 one end of which is pressed within the annularfiange 37. A knurled hand grip 43 slips over the outer end of the tubular casing and is attached thereto. This hand grip includes a plate 44 which closes the casing except fora central aperture through which the shaft 41 extends. The hub 45 of an actuating handle 46'is attached on the'projecting end of the shaft 41 by a pin 47.

n operation, the apparatus or tool will be shifted within the tube 10 until the rivet finds the desired hole, when the spring of the magazine will force the rivet into the hole. By shifting the whole apparatus further into the tube the abutment 20 is reached, the curved side of which engages a portion of the rivet head, and the bearing block 13' engaging the rivet head in groove 19 is ready to act as an anvil for the external riveting operation. The grip 43 is now held stationary by one hand of the operator and the handle 46 is turned with the other hand. The pin 39 imparts the rotary movement of shaft 41 to shaft 25 and as a result, the latter is advanced longitudinally owing to the engagement of spiral groove 26 and lug 27.

This longitudinal movement of shaft 25 is communicated to the spreading element which is forced between the block 13 and lock block 28. The wedge shaped surfaces 29 and 31 coact to push the bearing block 13 outwardly and force the rivet head tightly against the inner side of the tube. The expanding head composed of the blocks 13. 28 and element 30 thus acts to furnish a firm backing for the rivet during the riveting operation. Upon the completion of the riveting operation the grip 43 is grasped by one hand and the handle 46 is turned in the opposite direction by the other hand. This action withdraws the wedge-shaped spreading element and permits the expansible head to contract to normal position.

It will. be understood that the particular construction described and shown has been chosen for illustrative purposes merely and that the invention as defined by the claims hereunto appended may be otherwise embodied and applied Without departing from the spirit and scope thereof.

I claim: 1. Ina tool of the class described, th combination of an expansible head having a bearing block provided with a passage therethrough, terminating in a. groove provided with a concaved recess at one end a tubular container communicating with said passage, a spring in said container, rivets in said passage and container subject to the pressure of said spring, and means for expanding said head.

2. In a tool of the class described, the

combination of an expansible head having a bearing block provided with a passage terminating in an areuate groove having a concaved recess at one end thereof, means for feeding rivets when the block is properly located so that the rivet heads are positioned in said recess, and-means for expanding saidhead.

3. In a tool of the class described, the combination of an expansible head including a longitudinally movable spreading element,

rotatable operating mechanism, and means associated therewith for convertingthe i'otational movements of said mechanism into movements of said spreading element longitudinally with respect to said block.

4. In a tool of the class described, the combination of an expansible head including a longitudinally movable spreading element, a rotatable and longitudinally movable shaft, a connection between'said shaft and element adapted to transmit only the longitudinal movements of the shaft to said element, an operatin shaft, a connection between said shafts adapted to transmit rotary motion and permit relative longitudinal movements thereof, and means for moving said first named shaft lon itudinally upon rotation of said operating s aft.

5. In a tool of the classdescribed, the

combination of an expansible head, a rotatable operating shaft, a s reading element revolubly mounted on sai operating shaft, means operatively connecting said block to said shaft in such a manner that rotation of said shaft results in relative lon itudinal motion between said shaft and said block,

tion during the-actuation of said shaft, said block being provided with a lug adapted to travel in a spirally cut groove 1n said shaft in such a manner that the rotary motion of said shaft results in relative longitudinal motion between said block and said shaft.

7. In a tool of the class described, the combination' of an expansible head. a rotatable operating shaft, a spreading element revolubly mounted on said operating shaft, means operatively connecting said block to said shaft in such a manner that rotation of'said shaft results in relative longitudinal motion between said shaft and said block, and means for holding said head from rotation during the actuation of said shaft, said block being provided with a lug adapted to travel in a a and means for holding said head from rotaw spirally cut groove, in said shaft in such a manner that the rotary motion of said shaft results in relative longitudinal motion between said block and said shaft, said spreading element being revolubly mounted on but fixed against relative longitudinal motion with respect to said shaft.

8. In a tool of the class described, the combination of an expansible head, a rotatable operating shaft, a spreading element revolubly mounted on said operating shaft, means operatively connecting said block to said shaft in such a manner that rotation of said shaft results in relative longitudinal motion between said shaft and said block, and means for holding said head from rotation during the actuation of said shaft, said block being provided with a lug adapted to travel in a spirally cut groove in said shaft in such a manner that the rotary motion of said shaft results in relative longitudinal motion between said block and said shaft, and arcuate passageway in said block terminating in a substantially hemispherical recess for the purpose described.

In testimony whereof I afiix my signature.

SIDNEY P. LYON. 

